Power over Ethernet system having multiple power source devices and power-good detection device thereof
AssigneeIC Plus Corp.
InventorsChef HSIAO, Daniel KUO
Life of this patent
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Abstract
Power-good detection device for a PoE system with multiple power source devices having multiple power source devices comprises an input to connect multiple power source devices, power state detection circuit to measure power state signals received by the input and power-good threshold generation circuit to generate a threshold value in response to an input control signal. The power-good detection device determines a power-good (normal) and a failure state of the power source devices based on the threshold value and provides a power-good state signal.
Claims12
A power-good detection device for a PoE system with multiple power source devices, comprising:
- a plurality of power state signal input terminals, each terminal to be electrically connected with at least one power source device, to receive a power state signal from the power source device;
- a power state detection circuit connected to the plurality of power state signal input terminals for receiving the power state signal and determining whether the power supply state of the corresponding power source device is in normal state, according to the power state signal;
- and
- a power-good threshold generation circuit comprising a control signal input terminal for generating a power-good threshold value according to a control signal received at the control signal input terminal, and for providing the power-good threshold value to the power state detection circuit;
- wherein, the power state detection circuit determines a power-good state of a power source device according to a corresponding power-good threshold value and generates a power-good state signal representing the determined power-good state.
Dependencies are inferred from the claim text.